/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cn.edu.thu.laud.utils.serde;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

/**
 * @author zhuoan
 *
 */
public class JavaSerializer implements Serializer {


	/* (non-Javadoc)
	 */
	@Override
	public byte[] getBytes(Object value) {
		try {
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			ObjectOutputStream oos = new ObjectOutputStream(bos);
			oos.writeObject(value);
			oos.flush();

			byte[] bytes = bos.toByteArray();

			oos.close();
			bos.close();

			return bytes;
		} catch (Exception e) {
			throw new RuntimeException("Unable to serialize to object", e);
		}
	}

	/* (non-Javadoc)
	 */
	@SuppressWarnings("unchecked")
	@Override
	public <T> T getObject(byte[] bytes) {
		try {
			ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
			ObjectInputStream ois;

			ois = new ObjectInputStream(bis);

			T serialized = (T) ois.readObject();
			ois.close();
			bis.close();

			return serialized;
		} catch (Exception e) {
			throw new RuntimeException("Unable to de-serialize to object", e);
		}
	}

	@Override
	public int size(Object value) {
		//no object can be larger than 2048 bytes
		return 2048;
	}

}
